<template>
  <div class="login_container">
    <el-row>
      <el-col :span="12" :xs="0"></el-col>
      <el-col :span="12" :xs="24">
        <!-- 登录的表单 -->
        <el-form class="login_form" :model="loginForm" :rules="rules" ref="loginForms">
          <h1>Hello</h1>
          <h2>欢迎来到秒杀系统</h2>
          <el-form-item prop="userName">
            <el-input style="width: 350px" :prefix-icon="User" v-model="loginForm.userName"></el-input>
          </el-form-item>
          <el-form-item prop="password">
            <el-input style="width: 350px" type="password" :prefix-icon="Lock" v-model="loginForm.password"
                      show-password></el-input>
          </el-form-item>
          <el-form-item prop="scence">
            <el-select
                v-model="loginForm.type"
                placeholder="请选择"
                style="width: 350px"
            >
              <el-option
                  v-for="item in options"
                  :key="item.value"
                  :label="item.label"
                  :value="item.value"
              />
            </el-select>
          </el-form-item>
          <el-form-item>
            <el-button :loading="loading" class="login_btn" type="primary" size="default" @click="login">登录</el-button>
          </el-form-item>
        </el-form>
      </el-col>

    </el-row>

  </div>
</template>

<script setup lang="ts">
import { User, Lock } from '@element-plus/icons-vue'
import { reactive, ref } from 'vue'
import { useRouter, useRoute } from 'vue-router'
import { ElNotification } from 'element-plus'
import useUserStore from '@/store/modules/user'

const options = [
  {
    value: '0',
    label: '运营',
  },
  {
    value: '1',
    label: '用户',
  },
]
let useStore = useUserStore()
//引入获取当前时间的函数
import { getTime } from '@/utils/time'
//收集账号与密码的数据
let loginForm = reactive({ userName: 'binghe', password: '123456', type: '0' })
//登录按钮回调
//获取el-form组件
//定义变量控制按钮加载效果
let loading = ref(false)
let scence = ref<any>()
let loginForms = ref()
//获取路由器
let $router = useRouter()
//路由对象
let $route = useRoute()
const login = async () => {
  //保证全部表单相校验通过再发请求
  await loginForms.value.validate()
  //加载效果:开始加载
  loading.value = true
  //点击登录按钮以后干什么?
  //通知仓库发登录请求
  //请求成功->首页展示数据的地方
  //请求失败->弹出登录失败信息
  try {
    //保证登录成功
    await useStore.userLogin(loginForm)
    //编程式导航跳转到展示数据首页
    //判断登录的时候,路由路径当中是否有query参数，如果有就往query参数挑战，没有跳转到首页
    let redirect: any = $route.query.redirect
    $router.push({ path: redirect || '/' })
    //登录成功提示信息
    ElNotification({
      type: 'success',
      message: '欢迎回来',
      title: `HI,${getTime()}好`,
    })
    //登录成功加载效果也消失
    loading.value = false
  } catch (error) {
    //登录失败加载效果消息
    loading.value = false
    //登录失败的提示信息
    ElNotification({
      type: 'error',
      message: (error as Error).message,
    })
  }
}
//自定义校验规则函数
const validatorUserName = (rule: any, value: any, callback: any) => {
  //rule:即为校验规则对象
  //value:即为表单元素文本内容
  //函数:如果符合条件callBack放行通过即为
  //如果不符合条件callBack方法,注入错误提示信息
  if (value.length >= 2) {
    callback()
  } else {
    callback(new Error('账号长度至少两位'))
  }
}

const validatorPassword = (rule: any, value: any, callback: any) => {
  if (value.length >= 2) {
    callback()
  } else {
    callback(new Error('密码长度至少两位'))
  }
}
//定义表单校验需要配置对象
const rules = {
  //规则对象属性:
  //required,代表这个字段务必要校验的
  //min:文本长度至少多少位
  //max:文本长度最多多少位
  //message:错误的提示信息
  //trigger:触发校验表单的时机 change->文本发生变化触发校验,blur:失去焦点的时候触发校验规则
  userName: [
    // { required: true, min: 6, max: 10, message: '账号长度至少六位', trigger: 'change' }
    { trigger: 'change', validator: validatorUserName },
  ],
  password: [
    // { required: true, min: 6, max: 15, message: '密码长度至少6位', trigger: 'change' }
    { trigger: 'change', validator: validatorPassword },
  ],
}
</script>

<style scoped lang="scss">
.login_container {
  width: 100%;
  height: 100vh;
  background: url('./src/assets/images/background1.jpg') no-repeat;
  background-size: cover;

  .login_form {
    position: relative;
    width: 45%;
    top: 30vh;
    background: url("./src/assets/images/login_form.png") no-repeat;
    background-size: cover;
    padding: 40px;

    h1 {
      color: white;
      font-size: 40px;
    }

    h2 {
      font-size: 20px;
      color: white;
      margin: 20px 0;
    }

    .login_btn {
      width: 100%;
    }
  }
}
</style>
